of course. open the footer.php file and scroll down to the social bookmark list. there you need to change the url:

“http://dribbble.com/” with “http://linkedin.com/”

Whenever you fill in into the dribbble field in your backend will now link to linkedin. you might also want to replace the dribbble icon in your images/layout folder with a linkedin icon like this one: http://www.iconfinder.com/icondetails/65837/24/